/// <summary>Check latest gitter version on this chanel.</summary>
/// <returns>Latest gitter version.</returns>
public Version CheckVersion()
{
Version result = null;
var cmd = new LsRemoteCommand(
LsRemoteCommand.Heads(),
LsRemoteCommand.Tags(),
new CommandParameter(_url));
GitOutput output;
try
{
output = GitProcess.Execute(new GitInput(cmd));
}
catch
{
return null;
}
if(output.ExitCode != 0)
{
return null;
}
var parser = new GitParser(output.Output);
string branchSHA1 = null;
while(!parser.IsAtEndOfString)
{
var sha1 = parser.ReadString(40, 1);
var refname = parser.ReadLine();
if(branchSHA1 == null)
{
if(refname == GitConstants.LocalBranchPrefix + _branch)
{
branchSHA1 = sha1;
}
}
else
{
if(sha1 == branchSHA1 &&
refname.Length > GitConstants.TagPrefix.Length + 1 &&
refname.StartsWith(GitConstants.TagPrefix) &&
refname[GitConstants.TagPrefix.Length] == 'v')
{
var s = GitConstants.TagPrefix.Length + 1;
var e = refname.Length - 1;
while(s < refname.Length && !char.IsDigit(refname[s])) ++s;
while(e > 0 && !char.IsDigit(refname[e])) --e;
if(e > s && Version.TryParse(refname.Substring(s, e - s + 1), out result))
{
break;
}
else
{
result = null;
}
}
}
}
return result;
}
public IList<RevisionGraphData> ParseRevisionGraph(GitOutput output)
{
Assert.IsNotNull(output);
output.ThrowOnBadReturnCode();
var parser = new GitParser(output.Output);
var result = new List<RevisionGraphData>();
while(!parser.IsAtEndOfString)
{
var sha1 = parser.ReadString(40, 1);
int end = parser.FindNullOrEndOfString();
int numParents = (end - parser.Position + 1) / 41;
if(numParents == 0)
{
parser.Position = end + 1;
result.Add(new RevisionGraphData(sha1, new string[0]));
}
else
{
var parents = new List<string>(numParents);
for(int i = 0; i < numParents; ++i)
{
parents.Add(parser.ReadString(40, 1));
}
result.Add(new RevisionGraphData(sha1, parents));
}
}
return result;
}
public IList<NoteData> ParseNotes(GitOutput output)
{
Assert.IsNotNull(output);
output.ThrowOnBadReturnCode();
var res = new List<NoteData>();
var notes = output.Output;
if(notes.Length > 81)
{
var parser = new GitParser(notes);
while(!parser.IsAtEndOfString)
{
var noteSHA1 = parser.ReadString(40, 1);
var objectSHA1 = parser.ReadString(40, 1);
res.Add(new NoteData(noteSHA1, objectSHA1, null));
}
}
return res;
}